Power Transistor Check - Daikin VRVII Manual

CHECK 4
Perform the following procedures prior to check.
(1) Power OFF.
(2) Remove all the wiring connected to the PCB where
power transistors are mounted on.
[Preparation]
Multiple
tester
[Point of Measurement and Judgement Criteria]
Turn OFF the power supply. Then, after a lapse of 10
minutes or more, make measurement of resistance.
When using the analog type of multiple tester, make
measurement in resistance measurement mode in the
x1kΩ range.
Measuring
point
No.
+
1 P2
2 P2
3 P2
4 U
5 V
6 W
7 N3
8 N3
9 N3
10 U
11 V
12 W
354
Troubleshooting by Indication on the Remote Controller

Power Transistor Check

Judgement
Criteria
–
U
2 ~ 15k Ω
V
W
P2
P2
P2
15k Ω and more
(including
U
V
W
N3
2 ~ 15k Ω
N3
N3
∗ Prepare the analog
type of multiple tester.
For the digital type of
multiple tester, those
with diode check
function are available
for the checking.
Due to condenser charge and
so on, resistance
) measurement may require
some time.
Remarks